Diagnostic testing material



FIG. 1 is an exploded perspective view of a diagnostic testing material, showing my new design;

FIG. 2 is a top plan view thereof, the bottom being flat and unadorned;

FIG. 3 is a side elevational view thereof, the opposite side view being a mirror image; and,

FIG. 4 is an end view thereof, the opposite end view being a mirror image. 

An ornamental design for a diagnostic testing material, as shown and described. 